What is the flammable limit range of...

Question 1 of 31048fy_heal_CREATE_q201_2027

What is the flammable limit range of petroleum vapors mixed with air?

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Question 1 of 31048

Q

What is the flammable limit range of petroleum vapors mixed with air?

🔍 Key Concepts

• Lower Flammable Limit (LFL) of a fuel-air mixture • Upper Flammable Limit (UFL) of a fuel-air mixture • Typical flammable range of petroleum vapors (like gasoline) in air used in marine safety training

💭 Think About

• Think about the concentration range of petroleum vapor in air where it can actually burn or explode, not when it is too lean or too rich. • Recall whether the flammable range of common petroleum products is relatively narrow or very wide in percent by volume in air. • Compare each choice to what you’ve learned about common cargoes like gasoline or crude oil—does their flammable range usually stay in the low single digits, the teens, or over 20%?

✅ Before You Answer

• Make sure the chosen range starts above 0%, because air with no vapor cannot burn. • Verify that the upper value you pick is not so high that the mixture would usually be too rich to burn. • Confirm that the range you select matches the standard textbook flammable range often quoted for petroleum vapors in basic tanker/firefighting courses.